Fastening and plane-bits.



J. BAHMILLER.

FASTENING FOR PLANE BITS.

APPLIOATION IILED NOV. 25, 1912.

1,092,326. ed Apr. 7, 1914 IIV Snow wow John Bah miller oliwllu may"co..wunuwmu. a. z.

UNITED STATES PATENT OFFICE.

JOHN BAHMILLER, OF SALEM, OHIO.

FASTENING FOR PLANE-BITS.

Application filed November 25, 1912.

To all whom it may concern Be it known that 1, JOHN BAI-IMILLER, acitizen of the United States, residing at Salem, in the county ofColumbiana and State of Ohio, have invented certain new and usefulImprovements in Fastenings for Plane-Bits, of which the following is aspecification, reference being had to the accompanying drawings.

This invention relates to new and'useful improvements in fastenings forplane-bits and has for its object to provide a fastening which willadmit of the bit being readily adjusted to the various positionsdesired.

A further object of the invention resides in providing a bit having acentral longitu dinal slot, the one wall of which is provided with rackteeth and a still further object resides in providing means on thesecuring member between the bit and cap-iron adapted for cooperationwith said rack teeth to adjust said bit to its various positions. I

A further object of the invention resides in providing a device which isextremely simple and durable in construction, inexpensive to manufactureand one which will be very eflicient and useful in operation.

lVith these and other objects in view, the invention consists in thenovel features of construction, combination and arrangement of parts aswill be hereinafter referred to and more particularly pointed out in thespecification and claim.

In the accompanying drawing forming a part of this application, Figure 1is a plan view of a bit showing my improvements applied to use thereon.Fig. 2 is a vertical longitudinal section therethrough; and Fig. 8 is aperspective view of the sleeve member adapted to cooperate with the rackteeth on the bit.

In describing my invention, I shall refer to the drawing in whichsimilar reference characters designate corresponding parts throughoutthe several views and in which- 1 indicates a bit such as is used in theusual bench plane or the like, the same being provided with a centrallongitudinal slot 2, the forward end of which is enlarged as shown at 8.The under face of the bit 1, at the outer end thereof, has counter-sunktherein and welded or otherwise similarly secured thereto, the hardmetal surface 4:, which extends to the cutting edge thereof and one wallof the slot 2 is provided with rack teeth for the greater portion of itsSpecification of Letters Patent.

Patented Apr. '7, 1914.

Serial No. 733,449.

length, as shown at 5. A cap-iron 6 of the usual construction, is alsoprovided, the same having an opening 7 therein, and any other suchopenings as are demanded by the construction of the plane to which thesame is to be applied. This opening 7 is threaded and adapted to receivein engagement therewith, the threaded end of a screw 8 which is extendedthrough the slot 2 of the bit 1. In order to adjustably secure the bitand caplron together, however, and properly support the screw 8, Iprovide a substantial sleeve member 9, which is greater in diameter thanthe width of the slot 2 and is externally reduced at one end thereof topermit a portion thereof to extend through said slot. This reducedportion is of substantially the same diameter as the Width of said slotand is provided with rack teeth, as shown at 10, to engage the teeth 5in the one wall of said slot. This reduced portion with its rack teeth10 thereon forms a substantial gear and the outer periphery of theenlarged upper portion of said member 9 is knurled to be readily graspedby the operator and turned. The inner periphery of this sleeve memberfrom the enlarged end thereof, is increased in width as shown at 11 toprovide an annular shoulder and as the screw 8 is adapted to extendthrough this sleeve member, the head of said screw may be readily seatedon this annular shoulder.

In setting up the device, the sleeve member 9, with the screw 8 extendedtherethrough, is first disposed in the enlarged portion 3 of the slot 2and the cap-iron 6 brought into position to be engaged with the threadedend of said screw. The sleeve is then moved into the slot 2 until theteeth 10 are engaged with the teeth 5 of said slot, whereupon saidmember 9 is rotated until the bit is properly adjusted with respect tothe cap-iron. When the proper adjustment has been made, the screw 8 isthen turned until the same securely clamps said member 9 in its adjustedposition and the bit is then ready for use. Should, during the operationof the plane, it be desired to adjust said bit, it is only necessary toturn the screw 8 in the opposite direction to loosen the same, whereuponthe member 9 may be rotated, which operation will adjust said bit on thecap-iron. The screw is then tightened to securely retain the bit in thedesired position.

From the foregoing it will be seen that I have provided a simple,inexpensive and efficient means for carrying out the objects of theinvention, and while I have particularly described the elements bestadapted to perform the functions set forth, it is obvious that variouschanges in form, proportion and in the minor details of construction maybe resorted to without departing from the spirit or sacrificing any ofthe principles of the invention.

The hard metal surface 4 which is counter-sunk in the under face of thebit 1, and extends to the cutting edge thereof, is a plate which Willprevent the cutting edge from being unnecessarily nicked during the useof the device and thereby obviate the necessity of constantly sharpeningthesame. The provision of such a plate on the bit will not materiallyadd to the cost thereof and in the end will save considerable time andexpense.

Having thus described this invention, what I claim is In a plane, thecombination with a cap iron having a threaded opening arranged aboutcentrally therein; of a bit provided with a longitudinal slotterminating in an enlargement at one end thereof, one Wall of said slotbeing provided with teeth extending for the greater portion of itslength, a

sleeve disposed in the slot of said bit having teeth formed on the outerperiphery thereof, in engagement With the teeth of the one wall of saidslot, the teeth on said sleeve also contacting lightly with the oppositewall of said slot to prevent a loose movement of the sleeve therein, adisk-like head member formed on the upper end of said sleeve to projecton opposite sides of the slot in said bit and rest on the top face ofthe latter, said head member being of less diameter than the diameter ofthe enlargement of said slot and provided with a socket in the top facethereof, means provided on the outer peripheral edge of the head member,whereby to readily grasp the same, and a headed screw disposed throughsaid sleeve and engaged at its lower end with the threaded opening ofsaid cap iron, the head of said screw being received snugly in thesocket of the head of said sleeve to bind tightly therein and retain thebit in any adjusted position With respect to the cap iron.

In testimony whereof I hereunto afiix my signature in the presence oftwo witnesses.

JOHN BAHMILLER. Witnesses:

K. L. OOBOURN, MYRTA L. CoBoURN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

